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What am I doing wrong? There are also many functions whose documentation does not include even a partial list of error codes that can be returned. for example: first call of GetLastError() after a trading function returns an error code because your last OrderSend() returns -1 due to some failure - which prompts you into making call Subscribed!

Appease Your Google Overlords: Draw the "G" Logo Do Lycanthropy's added hit dice count as character levels for Vow of Poverty? Join them; it only takes a minute: Sign up How to get the error message from the error code returned by GetLastError()? True or False? This function retrieves the last error code, if any, and gets the text message associated with it, which is then converted to a standard string and returned.

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Visual Basic:Â Â Applications should call err.LastDllError instead of GetLastError. The most recent error will be set by the failing function. We always look for an example.

DWORD errorMessageID = ::GetLastError(); if(errorMessageID == 0) return std::string(); //No error message has been recorded LPSTR messageBuffer = nullptr; size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), GetLastError() returns an integer value, not a text message. The following sample demonstrates using FormatMessage to allocate and fill a buffer with the most recent error ( returned by a call to GetLastError ). The function finds the message definition in a message table resource based on a message identifier and a language identifier.

Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! From the MSDN documentation: Formats a message string. Multiple threads do not overwrite each other's last-error code. In other words: BB's code for 'grabbing' a copy of the error code is a necessity IF your code requires access to this last error code more than once...

The function copies the formatted message text to an output buffer, processing any embedded insert sequences if requested. This documentation is archived and is not being maintained. Easy on brain –Sreekar Jun 10 '15 at 6:24 add a comment| up vote 18 down vote MSDN has some sample code that demonstrates how to use FormatMessage() and GetLastError() together: What does it mean to use the Kernel32.dll so that this code can compile successfully?

similar set price label arrows within indicatorHelp please for Time...Error 130 Assistance needed please. 1936 BarrowBoy 2008.05.21 14:52 # ukt Dont think I did - certainly didnt mean to int le = Marshal.GetLastWin32Error(); return "Unable to get error code string from System - Error " + le.ToString(); } string sRet = Marshal.PtrToStringAnsi(lpMsgBuf); // Free the buffer. That indicates that the error code has been defined by an application, and ensures that your error code does not conflict with any error codes defined by the system. Why did my electrician put metal plates wherever the stud is drilled through?

Jun 5, 2008 at 1:31pm UTC Amag (8) Sorry I took too much time to react. if you call GetLastError() again it returns zero Specifically: int GetLastError( ) The function returns the last occurred error, then the value of special last_error variable where the last error code Jun 5, 2008 at 2:05pm UTC Duoas (10453) Hmm, I don't know and didn't find anything with a quick google. To obtain an error string for system error codes, use the FormatMessage function.

Shouldn't TS accepted this answer? –swdev Apr 15 '14 at 20:47 If it's necessary for a further throwing there is a simpler way to do it in C# with See the FormatMessage documentation for details. I get "strsafe.h: No such file or directory" and " 'StringCchPrintf' undeclared (first use this function) " as errors. The message definition can come from a buffer passed into the function.

up vote 65 down vote favorite 17 After a Windows API call, how can I get the last error message in a textual form? We appreciate your feedback. Retrieving the Last-Error Code When many system functions fail, they set the last-error code. up vote 24 down vote Easy example: wchar_t buf[256]; FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, 256, NULL); share|improve this answer edited Jan 21 '15 at 19:41 Bukes 2,995715 answered Jun 30

You should call the GetLastError function immediately when a function's return value indicates that such a call will return useful data. For this reason, we cannot provide the complete list of error codes that can be returned by each function. If you are defining an error code for your application, set this bit to one. CString FormatErrorMessage(DWORD ErrorCode) { TCHAR *pMsgBuf = NULL; DWORD nMsgLen = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, ErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), reinterpret_cast(&pMsgBuf), 0, NULL); if (!nMsgLen) return _T("FormatMessage fail"); CString sMsg(pMsgBuf, nMsgLen);

with open write and read.help with a problem with stoploss in my EA 15 Undercover 2008.05.21 13:35 # BarrowBoy: U You have the error number - you need nothing Developing web applications for long lifespan (20+ years) How to use the binomial theorem to calculate binomials with a negative exponent What (combination of) licenses is popular for public/shared proprietary software Anyone could help? still gotta suffer some more!" I keep a picture in my mind of MT giving me some GBH (that way I can generate a smile during those frustrating times :) :o))

Generate and add keyword variations using AdWords API Comments and Discussions You must Sign In to use this message board. similar Help programming / debugging my EAError 31 and lotsNeed help correcting codewhy my OrderSend function failed to work ?Error Code 1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 1936 BarrowBoy 2008.05.21 14:01 # U Its the same in SQL Server for @@ERROR and goodness knows I've done enough of that...! -BB- similar errors when testing an expert2 questionsNewbie trying to ramp up quicklyAnyone else have

This documentation is archived and is not being maintained. GetLastError function Retrieves the calling thread's last-error code value. For detailed information about the error, use the Get(LastODBCError) function. You need to note both the programmatic and the run-time context in which these errors occur. The function requires a message definition as input. Putting pin(s) back into chain What would be the atomic no. C# questions Linux questions ASP.NET questions SQL questions VB.NET q...

Que poco observador soy :-)EliminarRoger Almeida Martinez10 de mayo de 2013, 17:37No hay problema :)EliminarResponderJulian7 de mayo de 2013, 9:35Es dificil encontrar esta aplicación. For example, the Web Kit framework has its own domain for errors in its Objective-C implementation, WebKitErrorDomain. You access this dictionary by sending a userInfo...